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Using lis3dx to detect the acceleration threshold in a car accident

Question asked by Kefei Yao on Mar 23, 2018
Latest reply on Apr 10, 2018 by Kefei Yao

The purpose is to detect the car accident while ignore the normal acceleration variance during car driving. 

I know there is a high pass filter in the lis3dx sensor, and the cut-off frequency can be changed by setting the following register (with actual cut-off frequency related to ODR setting) but don't know how to choose the best value. I guess there is experience value for the ODR and HPCF settings in car application. Anyone have relevant experience and would like to share it with me?